●EFFICIENCY FILTRATION:Cobectal Air Purifier features a true HEPA air filter that captures 99.97% of particles. Besides, this uses advanced air spiral technology and 360-degree inlets, which can improve the air in a room as large as 215 square feet every hour. The small portable air purifier is perfect for pet rooms, desks, bedrooms, dormitories, offices, and other small rooms ●ENERGY-SAVING: We understand the importance of conserving energy. The small room air purifier is designed with an adjustable timer for 1-9 hours. So you can flexibly set the usage time and improve the air at regular intervals. And this air purifier has a low power rating of 10W. At high speed, the power usage remains extremely low. Its exquisite design and efficient purification capacity make it ideal for households with pets, as well as a thoughtful Christmas gift for loved ones ●USER-FRIENDLY: Cobectal H13 air purifiers for bedroom has 4 different wind speeds (Sleep/1/2/3) depending on your environment and needs. The higher the level, the greater the purification wind speed and the faster the purification speed ●SLEEP MODE,WHISPER-QUIET OPERATION: Set your air purifier to sleep mode, the room air purifier will run at a silent noise level of lower than 24dB. The on-screen button light will go out in sleep mode after 30s -40s no operation, allowing you to enjoy a peaceful rest ( In F0 Sleep Mode). ●FILTER REPLACEMENT REMINDER: For your health, Cobectal room air purifiers are equipped with a 2000-hour cartridge replacement reminder. This helps you know better how long the filter will last. For optimal performance, we recommend replacing the filter cartridge once every 3-6 months.Please use the official Cobectal Filter:B0CQLTT6FQ. (NOTE: The charging cable and filter element are placed inside the air purifier.)If you have any questions, please feel free to contact us.